PVC kub stabilizersua lub luag haujlwm tseem ceeb hauv kev ua kom muaj kev ua tau zoo thiab ua haujlwm ntev ntawm cov kav dej PVC. Cov stabilizers yog cov khoom siv ntxiv los tiv thaiv PVC cov ntaub ntawv los ntawm kev puas tsuaj los ntawm kev raug tshav kub, lub teeb thiab oxygen. Nyob rau hauv tsab xov xwm no, peb yuav tshawb nrhiav cov ntawv thov ntawm PVC thermal stabilizers hauv PVC kav thiab lawv qhov tseem ceeb rau kev tswj cov yeeb nkab zoo.
PVC, los yog polyvinyl chloride, yog cov khoom siv ntau yam uas feem ntau siv hauv kev tsim kho kev lag luam rau ntau yam kev siv, nrog rau cov kav dej, fittings thiab conduits. Cov kav dej PVC yog dav siv hauv dej, dej, dej thiab dej phwj kho tshuab vim lawv cov kav ntev, corrosion kuj, thiab yooj yim ntawm installation. Txawm li cas los xij, cov khoom siv PVC zoo li degrade thaum raug tshav kub thiab lub teeb, ua rau poob ntawm cov neeg kho tshuab lub zog thiab discoloration.
Txhawm rau kov yeej qhov kev sib tw no, PVC cov khoom siv hluav taws xob yog siv los tiv thaiv cov khoom siv PVC los ntawm thermal degradation thaum lub sij hawm ua thiab kev pab cuam lub neej ntawm PVC kav. Lub hom phiaj ntawm cov stabilizers no yog txhawm rau tiv thaiv cov kev cuam tshuam degradation uas tshwm sim thaum PVC raug tshav kub thiab lub teeb, yog li ncua kev pab cuam lub neej ntawm cov yeeb nkab thiab tswj nws cov khoom siv kho tshuab.
Muaj ntau ntau hom PVC thermal stabilizers siv rau PVC kav, nrog rau cov hlau lead-based stabilizers, tin-based stabilizers, calcium-based stabilizers thiab organic-based stabilizers. Txhua hom stabilizer muaj nws cov khoom tshwj xeeb thiab cov txiaj ntsig, thiab xaiv qhov tsim nyog stabilizer yog nyob ntawm qhov tshwj xeeb ntawm koj daim ntawv thov PVC yeeb nkab.
Lead-based stabilizers, xws li lead stearate thiab lead trivalent sulfate, tau siv dav hauv yav dhau los vim lawv cov thermal stability zoo heev thiab cov nqi-zoo. Txawm li cas los xij, vim muaj kev txhawj xeeb txog ib puag ncig thiab kev noj qab haus huv, ntau lub teb chaws tau txiav tawm kev siv cov hmoov lead-based stabilizers thiab hloov lawv nrog lwm cov stabilizers.
Tin-raws li stabilizers, xws li dibutyltin dilaurate thiab tributyltin oxide, paub txog lawv cov thermal stability thiab clarity, ua rau lawv haum rau daim ntaub ntawv uas cov xim tuav tseem ceeb. Cov stabilizers no kuj zoo tiv thaiv PVC yeeb nkab los ntawm degradation thaum ua thiab sab nraum zoov raug.
Calcium-based stabilizers, xws li calcium stearate thiab calcium zinc stabilizers, yog cov khoom siv tsis muaj tshuaj lom rau cov hmoov lead-raws li stabilizers thiab feem ntau siv los tsim cov kav dej PVC rau cov dej haus thiab ntim khoom noj. Cov stabilizers no muaj qhov zoo thermal stability thiab huab cua tsis kam, ua rau lawv haum rau kev siv sab nraum zoov.
Organic stabilizers, xws li epoxidized soybean roj thiab methyltin mercaptide, yog muab los ntawm tej yam ntuj tso qhov chaw thiab yog nrov vim lawv ib puag ncig tus phooj ywg thiab tsis muaj tshuaj lom zog. Cov stabilizers zoo tiv thaiv cov kav dej PVC los ntawm thermal degradation thiab tsim nyog rau kev siv nrog cov kev cai nruj ib puag ncig.
Thaum lub sij hawm tsim cov txheej txheem ntawm PVC kav, PVC thaum tshav kub kub stabilizers yog ntxiv rau PVC resin thaum lub sij hawm compounding txheej txheem los tsim ib homogeneous sib tov. Stabilizers zoo inhibit qhov degradation tshwm sim los ntawm tshav kub thiab lub teeb los ntawm kev tsim cov complexes nrog PVC polymer chains. Qhov no ua kom ntseeg tau tias cov yeeb nkab PVC tuav nws lub zog txhua yam, xim ruaj khov thiab kev ntseeg siab thoob plaws hauv nws lub neej ua haujlwm.
Thaum lub sij hawm kev pab cuam lub neej ntawm PVC kav, raug rau lwm yam xws li tshav ntuj, kub hloov, tshuaj, thiab lwm yam yuav ua rau kom lub degradation ntawm PVC cov ntaub ntawv. PVC kub stabilizers ua lub luag haujlwm tseem ceeb hauv kev tiv thaiv cov kav dej los ntawm cov khoom tsis zoo no, ua kom lawv cov kev ua haujlwm ntev thiab kev ntseeg tau.
Daim ntawv thov ntawm PVC thaum tshav kub kub stabilizers yog qhov tseem ceeb rau kev tswj xyuas qhov zoo thiab kev ua haujlwm ntawm cov kav dej PVC. Cov stabilizers no tiv thaiv cov khoom siv PVC los ntawm thermal degradation thiab xyuas kom meej tias cov yeeb nkab tswj nws cov khoom siv, xim ruaj khov thiab kev ncaj ncees. Raws li kev txhim kho thev naus laus zis nce qib, tam sim no muaj ntau txoj hauv kev los ua kom tau raws li cov kev cai tshwj xeeb ntawm cov ntawv thov PVC sib txawv. Raws li qhov kev thov rau cov kav dej PVC zoo thiab ruaj khov txuas ntxiv mus, qhov tseem ceeb ntawm PVC cov cua sov stabilizers hauv PVC yeeb nkab kev lag luam tsis tuaj yeem overstated.
Post lub sij hawm: Jan-10-2024